The stair riser code is up to 7.75 inches, and can not vary more than 3/8 of an inch. … The tread depth code for residential stairs should be no less than 10 inches with nosing, no less than 11 inches without nosing, and maximum tread depth variation should also be less than 3/8 of an inch.

What is the code for stair rise and run?

What is code for rise and run of stairs? The 2018 IBC building code for rise and run of stairs is a maximum 7″ rise and minimum 11″ run (tread depth). The OSHA standard for rise and run of stairs is maximum 9.5″ rise and minimum 9.5″ run (tread depth). The IBC maximum rise of a single stair flight is 12.

What is the minimum width for a staircase?

The minimum recommended stair width is between 34″ and 36″ Across the width of the tread. Some codes such as CA/OSHA specify a minimum stairway width of 24″ [35].. The minimum recommended stair landing length is 36″ (or a length and width sufficiently greater than the swing of the door if a wider door is present.